#define _CRT_SECURE_NO_WARNINGS
//#include <stdio.h>

	//int main()
	//{
		//int a = 10;
		//int b = 20;
		//scanf("%d %d", &a, &b);
		//int sum = a + b;
		//printf("%d\n", sum);
		//return 0;
//}


//#include <stdio.h>

//int main()
//{

	//double a = 8.88;
	//double b = 9.99;
	//scanf("%lf &lf", &a, &b);
	//double sum = a + b;
	//printf("%lf\n", sum);
	//return 0;
//}


#include <stdio.h>

int main()
{

	char a;
	char b;
	printf("%c\n",'a');
	printf("%c\n", 'b');
	return 0;
}